/// 
/// MaDAson - Toolkit for Model Driven Software Development
/// 
/// Copyright [2006] Marcus Lankenau
/// 
/// Licensed under the Apache License, Version 2.0 (the "License");
/// you may not use this file except in compliance with the License.
/// You may obtain a copy of the License at
///  
///     http://www.apache.org/licenses/LICENSE-2.0
///  
/// Unless required by applicable law or agreed to in writing, software
/// distributed under the License is distributed on an "AS IS" BASIS,
/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
/// See the License for the specific language governing permissions and
/// limitations under the License.
/// 

using System;
using System.Collections.Generic;
using System.Text;

namespace Madason.MetaModel.DAO
{
	/// <summary>
	/// MetaModel Class for stored procedure
	/// </summary>
	public class Procedure : Operation
	{
		/// <summary>
		/// Check if the procedure has out parameter. This is important for java code
		/// generation since java doesn't support out parameter
		/// </summary>
		public bool HasOutParameter
		{
			get
			{
				foreach (Parameter param in Parameters)
					if (param.Dir != ParameterDir.In)
						return true;
				return false;
			}
		}

		public string StoredProcedureName
		{
			get
			{
				if (HasValue("procName"))
					return TaggedValues["procName"];
				else
					return Name;
			}
		}

		public string ReturnTypeName
		{
			get
			{
				if (HasOutParameter && Context.TargetLanguage == TargetLanguages.Java)
					return NamePascalCase + "Result";
				else if (ReturnType != null)
					return ReturnType.ExplicitName;
				else
					return "void";					
			}
		}



		public string ParameterString
		{
			get
			{
				StringBuilder buffer = new StringBuilder();
				bool first = true;

				foreach (Parameter param in Parameters)
				{
					if (param.Dir != ParameterDir.In && Context.TargetLanguage == TargetLanguages.Java)
						continue;

					if (!first) buffer.Append(", ");
					buffer.Append(param.Type.ExplicitName);
					buffer.Append(" ");
					buffer.Append(param.Name);
					first = false;
				}
				return buffer.ToString();
			}
		}


		public string QueryString
		{
			get
			{
				StringBuilder buffer = new StringBuilder();
				buffer.Append("begin ");
				if (ReturnType != null && ReturnType.Name != "void")
					buffer.Append("? := ");

				buffer.Append(StoredProcedureName);
				buffer.Append("(");
				bool isFirst = true;
				foreach (Parameter param in Parameters)
				{
					if (!isFirst)
						buffer.Append(", ");
					buffer.Append("?");
					isFirst = false;
				}
				buffer.Append("); end;");

				return buffer.ToString();
			}
		}
	}

	public class ProcedureList : List<Procedure>
	{
	}
}
